text: /*
   * "streamable kanji code filter and converter"
   * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
   *
   * LICENSE NOTICES
   *
   * This file is part of "streamable kanji code filter and converter",
   * which is distributed under the terms of GNU Lesser General Public
   * License (version 2) as published by the Free Software Foundation.
   *
   * This software is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with "streamable kanji code filter and converter";
   * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
   * Suite 330, Boston, MA  02111-1307  USA
   *
   * The author of this file:
   *
   */
  /*
   * the source code included in this files was separated from mbfilter_sjis_open.c
   * by Rui Hirokawa <hirokawa@php.net> on 25 July 2011.
   *
   */
  
  #include "mbfilter.h"
  #include "mbfilter_sjis_mac.h"
  
  #include "unicode_table_cp932_ext.h"
  #include "unicode_table_jis.h"
  
  #include "sjis_mac2uni.h"
  
  extern const unsigned char mblen_table_sjis[];
  
  static int mbfl_filt_conv_wchar_sjis_mac_flush(mbfl_convert_filter *filter);
  static int mbfl_filt_conv_sjis_mac_wchar_flush(mbfl_convert_filter *filter);
  
  static const char *mbfl_encoding_sjis_mac_aliases[] = {"MacJapanese", "x-Mac-Japanese", NULL};
  
  const mbfl_encoding mbfl_encoding_sjis_mac = {
  	mbfl_no_encoding_sjis_mac,
  	"SJIS-mac",
  	"Shift_JIS",
  	mbfl_encoding_sjis_mac_aliases,
  	mblen_table_sjis,
  	MBFL_ENCTYPE_GL_UNSAFE,
  	&vtbl_sjis_mac_wchar,
  	&vtbl_wchar_sjis_mac
  };
  
  const struct mbfl_convert_vtbl vtbl_sjis_mac_wchar = {
  	mbfl_no_encoding_sjis_mac,
  	mbfl_no_encoding_wchar,
  	mbfl_filt_conv_common_ctor,
  	NULL,
  	mbfl_filt_conv_sjis_mac_wchar,
  	mbfl_filt_conv_sjis_mac_wchar_flush,
  	NULL,
  };
  
  const struct mbfl_convert_vtbl vtbl_wchar_sjis_mac = {
  	mbfl_no_encoding_wchar,
  	mbfl_no_encoding_sjis_mac,
  	mbfl_filt_conv_common_ctor,
  	NULL,
  	mbfl_filt_conv_wchar_sjis_mac,
  	mbfl_filt_conv_wchar_sjis_mac_flush,
  	NULL,
  };
  
  #define CK(statement)	do { if ((statement) < 0) return (-1); } while (0)
  
  #define SJIS_ENCODE(c1,c2,s1,s2)	\
  		do {						\
  			s1 = c1;				\
  			s1--;					\
  			s1 >>= 1;				\
  			if ((c1) < 0x5f) {		\
  				s1 += 0x71;			\
  			} else {				\
  				s1 += 0xb1;			\
  			}						\
  			s2 = c2;				\
  			if ((c1) & 1) {			\
  				if ((c2) < 0x60) {	\
  					s2--;			\
  				}					\
  				s2 += 0x20;			\
  			} else {				\
  				s2 += 0x7e;			\
  			}						\
  		} while (0)
  
  #define SJIS_DECODE(c1,c2,s1,s2)	\
  		do {						\
  			s1 = c1;				\
  			if (s1 < 0xa0) {		\
  				s1 -= 0x81;			\
  			} else {				\
  				s1 -= 0xc1;			\
  			}						\
  			s1 <<= 1;				\
  			s1 += 0x21;				\
  			s2 = c2;				\
  			if (s2 < 0x9f) {		\
  				if (s2 < 0x7f) {	\
  					s2++;			\
  				}					\
  				s2 -= 0x20;			\
  			} else {				\
  				s1++;				\
  				s2 -= 0x7e;			\
  			}						\
  		} while (0)
  
  /*
   * SJIS-mac => wchar
   */
  int
  mbfl_filt_conv_sjis_mac_wchar(int c, mbfl_convert_filter *filter)
  {
  	int i, j, n;
  	int c1, s, s1, s2, w;
  
  	switch (filter->status) {
  	case 0:
  		if (c >= 0 && c < 0x80 && c != 0x5c) {	/* latin */
  			CK((*filter->output_function)(c, filter->data));
  		} else if (c > 0xa0 && c < 0xe0) {	/* kana */
  			CK((*filter->output_function)(0xfec0 + c, filter->data));
  		} else if (c > 0x80 && c <= 0xed && c != 0xa0) {	/* kanji first char */
  			filter->status = 1;
  			filter->cache = c;
  		} else if (c == 0x5c) {
  			CK((*filter->output_function)(0x00a5, filter->data));
  		} else if (c == 0x80) {
  			CK((*filter->output_function)(0x005c, filter->data));
  		} else if (c == 0xa0) {
  			CK((*filter->output_function)(0x00a0, filter->data));
  		} else if (c == 0xfd) {
  			CK((*filter->output_function)(0x00a9, filter->data));
  		} else if (c == 0xfe) {
  			CK((*filter->output_function)(0x2122, filter->data));
  		} else if (c == 0xff) {
  			CK((*filter->output_function)(0x2026, filter->data));
  			CK((*filter->output_function)(0xf87f, filter->data));
  		} else {
  			CK((*filter->output_function)(MBFL_BAD_INPUT, filter->data));
  		}
  		break;
  
  	case 1:		/* kanji second char */
  		filter->status = 0;
  		c1 = filter->cache;
  		if (c >= 0x40 && c <= 0xfc && c != 0x7f) {
  			w = 0;
  			SJIS_DECODE(c1, c, s1, s2);
  			s = (s1 - 0x21)*94 + s2 - 0x21;
  			if (s <= 0x89) {
  				if (s == 0x1c) {
  					w = 0x2014;		    /* EM DASH */
  				} else if (s == 0x1f) {
  					w = 0xff3c;			/* FULLWIDTH REVERSE SOLIDUS */
  				} else if (s == 0x20) {
  					w = 0x301c;			/* FULLWIDTH TILDE */
  				} else if (s == 0x21) {
  					w = 0x2016;			/* PARALLEL TO */
  				} else if (s == 0x3c) {
  					w = 0x2212;			/* FULLWIDTH HYPHEN-MINUS */
  				} else if (s == 0x50) {
  					w = 0x00a2;			/* FULLWIDTH CENT SIGN */
  				} else if (s == 0x51) {
  					w = 0x00a3;			/* FULLWIDTH POUND SIGN */
  				} else if (s == 0x89) {
  					w = 0x00ac;			/* FULLWIDTH NOT SIGN */
  				}
  			}
  
  			/* apple gaiji area 0x8540 - 0x886d */
  			if (w == 0) {
  				for (i=0; i<7; i++) {
  					if (s >= code_tbl[i][0] && s <= code_tbl[i][1]) {
  						w = s - code_tbl[i][0] + code_tbl[i][2];
  						break;
  					}
  				}
  			}
  
  			if (w == 0) {
  
  				for (i=0; i<code_tbl_m_len; i++) {
  					if (s == code_tbl_m[i][0]) {
  						if (code_tbl_m[i][1] == 0xf860) {
  							n = 4;
  						} else if (code_tbl_m[i][1] == 0xf861) {
  							n = 5;
  						} else {
  							n = 6;
  						}
  						for (j=1; j<n-1; j++) {
  							CK((*filter->output_function)(code_tbl_m[i][j], filter->data));
  						}
  						w = code_tbl_m[i][n-1];
  						break;
  					}
  				}
  			}
  
  			if (w == 0) {
  				for (i=0; i<8; i++) {
  					if (s >= code_ofst_tbl[i][0] && s <= code_ofst_tbl[i][1]) {
  						w = code_map[i][s - code_ofst_tbl[i][0]];
  						if (w == 0) {
  							CK((*filter->output_function)(MBFL_BAD_INPUT, filter->data));
  							return 0;
  						}
  						s2 = 0;
  						if (s >= 0x043e && s <= 0x0441) {
  							s2 = 0xf87a;
  						} else if (s == 0x03b1 || s == 0x03b7) {
  							s2 = 0xf87f;
  						} else if (s == 0x04b8 || s == 0x04b9 || s == 0x04c4) {
  							s2 = 0x20dd;
  						} else if (s == 0x1ed9 || s == 0x1eda || s == 0x1ee8 || s == 0x1ef3 ||
  								   (s >= 0x1ef5 && s <= 0x1efb) || s == 0x1f05 || s == 0x1f06 ||
  								   s == 0x1f18 || (s >= 0x1ff2 && s <= 0x20a5)) {
  							s2 = 0xf87e;
  						}
  						if (s2 > 0) {
  							CK((*filter->output_function)(w, filter->data));
  							w = s2;
  						}
  						break;
  					}
  				}
  			}
  
  			if (w == 0 && s >= 0 && s < jisx0208_ucs_table_size) {	/* X 0208 */
  				w = jisx0208_ucs_table[s];
  			}
  
  			if (w <= 0) {
  				w = MBFL_BAD_INPUT;
  			}
  			CK((*filter->output_function)(w, filter->data));
  		} else {
  			CK((*filter->output_function)(MBFL_BAD_INPUT, filter->data));
  		}
  		break;
  
  	default:
  		filter->status = 0;
  		break;
  	}
  
  	return 0;
  }
  
  static int mbfl_filt_conv_sjis_mac_wchar_flush(mbfl_convert_filter *filter)
  {
  	if (filter->status == 1) {
  		CK((*filter->output_function)(MBFL_BAD_INPUT, filter->data));
  	}
  	return 0;
  }
  
  /*
   * wchar => SJIS-mac
   */
  int
  mbfl_filt_conv_wchar_sjis_mac(int c, mbfl_convert_filter *filter)
  {
  	int i;
  	int c1, c2, s1, s2, mode;
  
  	s1 = 0;
  	s2 = 0;
  
  	// a1: U+0000 -> U+046F
  	// a2: U+2000 -> U+30FF
  	//  i: U+4E00 -> U+9FFF
  	//  r: U+FF00 -> U+FFFF
  
  	switch (filter->status) {
  
  	case 1:
  		c1 = filter->cache;
  		filter->cache = 0;
  		filter->status = 0;
  
  		s1 = 0;
  		s2 = 0;
  
  		if (c == 0xf87a) {
  			for (i=0;i<4;i++) {
  				if (c1 == s_form_tbl[i+34+3+3]) {
  					s1 = s_form_sjis_tbl[i+34+3+3];
  					break;
  				}
  			}
  			if (s1 <= 0) {
  				s2 = c1;
  			}
  		} else if (c == 0x20dd) {
  			for (i=0;i<3;i++) {
  				if (c1 == s_form_tbl[i+34+3]) {
  					s1 = s_form_sjis_tbl[i+34+3];
  					break;
  				}
  			}
  			if (s1 <= 0) {
  				s2 = c1;
  			}
  		} else if (c == 0xf87f) {
  			for (i=0;i<3;i++) {
  				if (c1 == s_form_tbl[i+34]) {
  					s1 = s_form_sjis_tbl[i+34];
  					break;
  				}
  			}
  			if (s1 <= 0) {
  				s2 = c1; s1 = -1;
  			}
  		} else if (c == 0xf87e) {
  			for (i=0;i<34;i++) {
  				if (c1 == s_form_tbl[i]) {
  					s1 = s_form_sjis_tbl[i];
  					break;
  				}
  			}
  			if (s1 <= 0) {
  				s2 = c1; s1 = -1;
  			}
  		} else {
  			s2 = c1;
  			s1 = c;
  		}
  
  		if (s2 > 0) {
  			for (i=0;i<s_form_tbl_len;i++) {
  				if (c1 == s_form_tbl[i]) {
  					s1 = s_form_sjis_fallback_tbl[i];
  					break;
  				}
  			}
  		}
  
  		if (s1 >= 0) {
  			if (s1 < 0x100) {
  				CK((*filter->output_function)(s1, filter->data));
  			} else {
  				CK((*filter->output_function)((s1 >> 8) & 0xff, filter->data));
  				CK((*filter->output_function)(s1 & 0xff, filter->data));
  			}
  		} else {
  			CK(mbfl_filt_conv_illegal_output(c, filter));
  		}
  
  		if (s2 <= 0 || s1 == -1) {
  			break;
  		}
  		s1 = s2 = 0;
  		ZEND_FALLTHROUGH;
  
  	case 0:
  
  		if (c >= ucs_a1_jis_table_min && c < ucs_a1_jis_table_max) {
  			s1 = ucs_a1_jis_table[c - ucs_a1_jis_table_min];
  			if (c == 0x5c) {
  				s1 = 0x80;
  			} else if (c == 0xa9) {
  				s1 = 0xfd;
  			}
  		} else if (c >= ucs_a2_jis_table_min && c < ucs_a2_jis_table_max) {
  			s1 = ucs_a2_jis_table[c - ucs_a2_jis_table_min];
  			if (c == 0x2122) {
  				s1 = 0xfe;
  			} else if (c == 0x2014) {
  				s1 = 0x213d;
  			} else if (c == 0x2116) {
  				s1 = 0x2c1d;
  			}
  		} else if (c >= ucs_i_jis_table_min && c < ucs_i_jis_table_max) {
  			s1 = ucs_i_jis_table[c - ucs_i_jis_table_min];
  		} else if (c >= ucs_r_jis_table_min && c < ucs_r_jis_table_max) {
  			s1 = ucs_r_jis_table[c - ucs_r_jis_table_min];
  		}
  
  		if (c >= 0x2000) {
  			for (i=0;i<s_form_tbl_len;i++) {
  				if (c == s_form_tbl[i]) {
  					filter->status = 1;
  					filter->cache = c;
  					return 0;
  				}
  			}
  
  			if (c == 0xf860 || c == 0xf861 || c == 0xf862) {
  				/* Apple 'transcoding hint' codepoints (from private use area) */
  				filter->status = 2;
  				filter->cache = c;
  				return 0;
  			}
  		}
  
  		if (s1 <= 0) {
  			if (c == 0xa0) {
  				s1 = 0x00a0;
  			} else if (c == 0xa5) { /* YEN SIGN */
  				/* Unicode has codepoint 0xFFE5 for a fullwidth Yen sign;
  				 * convert codepoint 0xA5 to halfwidth Yen sign */
  				s1 = 0x5c; /* HALFWIDTH YEN SIGN */
  			} else if (c == 0xff3c) {	/* FULLWIDTH REVERSE SOLIDUS */
  				s1 = 0x2140;
  			}
  		}
  
  		if (s1 <= 0) {
  			for (i=0; i<wchar2sjis_mac_r_tbl_len; i++) {
  				if (c >= wchar2sjis_mac_r_tbl[i][0] && c <= wchar2sjis_mac_r_tbl[i][1]) {
  					s1 = c - wchar2sjis_mac_r_tbl[i][0] + wchar2sjis_mac_r_tbl[i][2];
  					break;
  				}
  			}
  
  			if (s1 <= 0) {
  				for (i=0; i<wchar2sjis_mac_r_map_len; i++) {
  					if (c >= wchar2sjis_mac_r_map[i][0] && c <= wchar2sjis_mac_r_map[i][1]) {
  						s1 = wchar2sjis_mac_code_map[i][c-wchar2sjis_mac_r_map[i][0]];
  						break;
  					}
  				}
  			}
  
  			if (s1 <= 0) {
  				for (i=0; i<wchar2sjis_mac_wchar_tbl_len ; i++) {
  					if ( c == wchar2sjis_mac_wchar_tbl[i][0]) {
  						s1 = wchar2sjis_mac_wchar_tbl[i][1] & 0xffff;
  						break;
  					}
  				}
  			}
  
  			if (s1 > 0) {
  				c1 = s1/94+0x21;
  				c2 = s1-94*(c1-0x21)+0x21;
  				s1 = (c1 << 8) | c2;
  				s2 = 1;
  			}
  		}
  
  		if ((s1 <= 0) || (s1 >= 0x8080 && s2 == 0)) {	/* not found or X 0212 */
  			s1 = -1;
  			c1 = 0;
  
  			if (c == 0) {
  				s1 = 0;
  			} else if (s1 <= 0) {
  				s1 = -1;
  			}
  		}
  
  		if (s1 >= 0) {
  			if (s1 < 0x100) { /* latin or kana */
  				CK((*filter->output_function)(s1, filter->data));
  			} else { /* kanji */
  				c1 = (s1 >> 8) & 0xff;
  				c2 = s1 & 0xff;
  				SJIS_ENCODE(c1, c2, s1, s2);
  				CK((*filter->output_function)(s1, filter->data));
  				CK((*filter->output_function)(s2, filter->data));
  			}
  		} else {
  			CK(mbfl_filt_conv_illegal_output(c, filter));
  		}
  		break;
  
  
  	case 2:
  		c1 = filter->cache;
  		filter->cache = 0;
  		filter->status = 0;
  		if (c1 == 0xf860) {
  			for (i=0; i<5; i++) {
  				if (c == code_tbl_m[i][2]) {
  					filter->cache = c | 0x10000;
  					filter->status = 3;
  					break;
  				}
  			}
  		} else if (c1 == 0xf861) {
  			for (i=0; i<3; i++) {
  				if (c == code_tbl_m[i+5][2]) {
  					filter->cache = c | 0x20000;
  					filter->status = 3;
  					break;
  				}
  			}
  		} else if (c1 == 0xf862) {
  			for (i=0; i<4; i++) {
  				if (c == code_tbl_m[i+5+3][2]) {
  					filter->cache = c | 0x40000;
  					filter->status = 3;
  					break;
  				}
  			}
  		}
  
  		if (filter->status == 0) {
  			/* Didn't find any of expected codepoints after Apple transcoding hint */
  			CK(mbfl_filt_conv_illegal_output(c1, filter));
  			return mbfl_filt_conv_wchar_sjis_mac(c, filter);
  		}
  
  		break;
  
  	case 3:
  		s1 = 0;
  		c1 = filter->cache & 0xffff;
  		mode = (filter->cache & 0xf0000) >> 16;
  
  		filter->cache = 0;
  		filter->status = 0;
  
  		if (mode == 0x1) {
  			for (i=0; i<5; i++) {
  				if (c1 == code_tbl_m[i][2] && c == code_tbl_m[i][3]) {
  					s1 = code_tbl_m[i][0];
  					break;
  				}
  			}
  
  			if (s1 > 0) {
  				c1 = s1/94+0x21;
  				c2 = s1-94*(c1-0x21)+0x21;
  				SJIS_ENCODE(c1, c2, s1, s2);
  				CK((*filter->output_function)(s1, filter->data));
  				CK((*filter->output_function)(s2, filter->data));
  			}
  
  			if (s1 <= 0) {
  				CK(mbfl_filt_conv_illegal_output(0xf860, filter));
  				CK(mbfl_filt_conv_illegal_output(c1, filter));
  				CK(mbfl_filt_conv_illegal_output(c, filter));
  			}
  
  		} else if (mode == 0x2) {
  			for (i=0; i<3; i++) {
  				if (c1 == code_tbl_m[i+5][2] && c == code_tbl_m[i+5][3]) {
  					filter->cache = c | 0x20000;
  					filter->status = 4;
  					break;
  				}
  			}
  		} else if (mode == 0x4) {
  			for (i=0; i<4; i++) {
  				if (c1 == code_tbl_m[i+8][2] && c == code_tbl_m[i+8][3]) {
  					filter->cache = c | 0x40000;
  					filter->status = 4;
  					break;
  				}
  			}
  		}
  		break;
  
  	case 4:
  		s1 = 0;
  		c1 = filter->cache & 0xffff;
  		mode = (filter->cache & 0xf0000) >> 16;
  
  		filter->cache = 0;
  		filter->status = 0;
  
  		if (mode == 0x2) {
  			for (i=0; i<3; i++) {
  				if (c1 == code_tbl_m[i+5][3] && c == code_tbl_m[i+5][4]) {
  					s1 = code_tbl_m[i+5][0];
  					break;
  				}
  			}
  
  			if (s1 > 0) {
  				c1 = s1/94+0x21;
  				c2 = s1-94*(c1-0x21)+0x21;
  				SJIS_ENCODE(c1, c2, s1, s2);
  				CK((*filter->output_function)(s1, filter->data));
  				CK((*filter->output_function)(s2, filter->data));
  			}
  
  			if (s1 <= 0) {
  				CK(mbfl_filt_conv_illegal_output(0xf861, filter));
  				for (i=0; i<3; i++) {
  					if (c1 == code_tbl_m[i+5][3]) {
  						CK(mbfl_filt_conv_illegal_output(code_tbl_m[i+5][2], filter));
  						break;
  					}
  				}
  				CK(mbfl_filt_conv_illegal_output(c1, filter));
  				CK(mbfl_filt_conv_illegal_output(c, filter));
  			}
  		} else if (mode == 0x4) {
  			for (i=0; i<4; i++) {
  				if (c1 == code_tbl_m[i+8][3] && c == code_tbl_m[i+8][4]) {
  					filter->cache = c | 0x40000;
  					filter->status = 5;
  					break;
  				}
  			}
  		}
  		break;
  
  	case 5:
  		s1 = 0;
  		c1 = filter->cache & 0xffff;
  		mode = (filter->cache & 0xf0000) >> 16;
  
  		filter->cache = 0;
  		filter->status = 0;
  
  		if (mode == 0x4) {
  			for (i=0; i<4; i++) {
  				if (c1 == code_tbl_m[i+8][4] && c == code_tbl_m[i+8][5]) {
  					s1 = code_tbl_m[i+8][0];
  					break;
  				}
  			}
  
  			if (s1 > 0) {
  				c1 = s1/94+0x21;
  				c2 = s1-94*(c1-0x21)+0x21;
  				SJIS_ENCODE(c1, c2, s1, s2);
  				CK((*filter->output_function)(s1, filter->data));
  				CK((*filter->output_function)(s2, filter->data));
  			}
  
  			if (s1 <= 0) {
  				CK(mbfl_filt_conv_illegal_output(0xf862, filter));
  				for (i=0; i<4; i++) {
  					if (c1 == code_tbl_m[i+8][4]) {
  						CK(mbfl_filt_conv_illegal_output( code_tbl_m[i+8][2], filter));
  						CK(mbfl_filt_conv_illegal_output( code_tbl_m[i+8][3], filter));
  						break;
  					}
  				}
  				CK(mbfl_filt_conv_illegal_output(c1, filter));
  				CK(mbfl_filt_conv_illegal_output(c, filter));
  			}
  		}
  		break;
  
  	default:
  		filter->status = 0;
  		break;
  	}
  	return 0;
  }
  
  static int
  mbfl_filt_conv_wchar_sjis_mac_flush(mbfl_convert_filter *filter)
  {
  	int i, c1, s1 = 0;
  	if (filter->status == 1 && filter->cache > 0) {
  		c1 = filter->cache;
  		for (i=0;i<s_form_tbl_len;i++) {
  			if (c1 == s_form_tbl[i]) {
  				s1 = s_form_sjis_fallback_tbl[i];
  				break;
  			}
  		}
  		if (s1 > 0) {
  			CK((*filter->output_function)((s1 >> 8) & 0xff, filter->data));
  			CK((*filter->output_function)(s1 & 0xff, filter->data));
  		}
  	}
  	filter->cache = 0;
  	filter->status = 0;
  
  	if (filter->flush_function != NULL) {
  		return (*filter->flush_function)(filter->data);
  	}
  
  	return 0;
  }
  